Maarten Johannes "Martin" van Rijn (born 7 February 1956) is a Dutch politician and businessman who served as Minister for Medical Care from March to July 2020.

A member of the Labour Party (PvdA), he previously was CEO and chairman of the Reinier Haga Groep (a hospital conglomerate) from 1 December 2017.

On 15 November 2017 he was named president of the directing board of Reinier Haga Groep, managing hospitals in The Hague, Delft and Zoetermeer.

[1] On 20 March 2020, he was appointed as a replacement to the role of Minister of Medical Care due to the resignation of Bruno Bruins who collapsed from exhaustion during a parliamentary debate.

[2] In 2025, Van Rijn was asked by the government to mediate in collective bargaining for pharmacy workers.